Improvement in lifting-jacks



W M. CRAWFORD.

Lifting-Jack.

No. 203,711. Patented 'May 14', 1878.

UNITED STATES PATENT'OFFIGE.

WILLIAM M. CRAWFORD, OF SHILOH, OHIO.

IMPROVEMENT IN LlFTlNG-JACKS.

Specification forming part of Letters Patent N0. 203,711, dated May 14,1878 application filed April 9, 1878.

To all whom it may concern:

Be it known that I, W. M. CRAWFORD, of Shiloh, in the county of Richlandand State of Ohio, have invented certain new and useful Improvements inLifting Jacks; and I do hereby declare that the following is afull,clear, and exact description thereof, which will enable others skilledin the art to which it appertains to make and use the same, referencebeing -had to the accompanying drawings, and to lettrrs of referencemarked thereon, which form a part of this specification, and in which--Figure 1 is a side view of my improved lifting-jack. Fig. 2 is a similarview thereof, with an attachment for lifting fences, 800.; and Fig. 3 isa detached plan view of the stay or lever which serves to hold thelifting and I supporting lever in position.

fulcrumed a lifting and supporting lever, B

This invention appertains to certain improvements in lifting-jacks; andit consists of notched parallel uprights, between which is fulcrumed alifting and supporting lever, having a stay or lever engaging thenotches of the said uprights and, secondly, of the combination, with theabove, of certain other elements, substantially as hereinafter morefully set forth.

In the annexed drawing, A A mark two parallel uprights, preferably of anA shape, and provided upon their front edges with notches a a, thefunction of which will be presently described. The lower ends of theseuprights are bolted to afoot or foundation, 01/. Between the upper endsof these uprights is 7 whose fulcrum may be adjusted to any opposite twoof a series of apertures, 12 b, in the uprights AAin adapting the heightof the lever B to that of the axle or other weightit is desired to lift.Pivoted or hung to th e lever B is a lever V or stay, C, provided witharms 0 c, which enter any opposite two of the notches a a, to enable thestay or lever C to hold the lever B in post tion when supporting thelifted axle or other article. To the short arm of the lever B issuspended a block or pendant, D, which is adapted to permit theattachment thereto of a hook-shaped device, E, the latter being providedwith an arm, 0, for that purpose. The object of this device is to adaptthe jack to lifting fences and the like, as will be readily understoodfrom Fig. 1.

The short arm of the lever B may be lengthened when it is used in thelatter-mentioned capacity by adjusting its fulcrum to the aperture f.

This invention is adapted not only to liftand support the axles ofvehicles, but also to lift fences and the like, as already intimated.

In lifting the hind axles it may be found necessary to fold the block Dupon the short arm of the lever B, from which it is hung.

Having thus described my invention, what I claim, and desire to secureby Letters Patent isl. The notched uprights A A with perforations b,stay C with arms 0 a, lever B with block I), and hook E, substantiallyas shown and for the purpose specified.

2. The stay-bar C with arms 0 0, operating in notches a, the adjustablelever B, operating, as desired, in apertures I), block D, and hook E,substantially as shown and described.

In testimony that I claim the foregoing as my own invention I affix mysignature in presence of two witnesses.

WILLIAM M. CRAWFORD.

Witnesses: 'JoHN P. BLACK, J AM'ES BLACK.

